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Description

The Horsehead and Flame nebulas, with about 10 hours of time on it. Ha was used as luminance to enhance RGB data.

The glare of Alnitak didn't affect the Ha data, but it did result in a blue halo that I couldn't entirely remove in the color image. See the revisions for a B&W Ha-only image that is a better representation of reality, without glare artifacts - but also without color :/

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Sky plot

Histogram

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